Dispersion and lifetimes of electromagnetic modes attached to strongly textured slab waveguides

V. Pacradouni, W. J. Mandeville, A. R. Cowan, J. F. Young, Shane Johnson

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The influence of strong, two-dimensional (2D) periodic texture on the dispersion and lifetimes of resonant electromagnetic modes localized in the vicinity of thin (80 to 155 nm) GaAs membranes supported on thick (1 to 2 μm) wet-oxidized AlAs cladding layers is reported. A method of extracting this information by fitting Fano-like features in broadband specular reflectivity spectra is described in detail, and applied to samples containing both triangular and square 2D lattices. A new and easier method of probing the properties of these modes is also demonstrated. It involves incorporating a superlattice of 'defects' in the principal crystal lattice, and monitoring the defect diffraction spectrum, rather than the specular reflectivity.

Original languageEnglish (US)
Pages (from-to)161-169
Number of pages9
JournalOptical and Quantum Electronics
Issue number1-3
StatePublished - Jan 2002


  • Dispersion
  • Lifetimes
  • Photonic crystals
  • Slab waveguides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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